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Cardioid Condenser Headworn Microphone

ATM73a
  • Ideal for drummers, keyboard players or anyone requiring hands-free operation.
  • Comfortable, unobtrusive headband design with side-of-mouth pickup.
  • Belt-mounted power module operates on battery or phantom power.
  • Cardioid polar pattern improving isolation of desired sound source.
  • Also available as: ATM73cW - less power module; 1.4m cable terminated with locking 4-pin connector for A-T UniPak™ wireless systems.

  • ATM73a Specifications

    Element

    Fixed-charge back plate, permanently polarized condenser

    Polar Pattern

    Cardioid

    Frequency Response

    40 ~ 15,000 Hz

    Low Frequency Roll-Off

    80 Hz, 18 dB/octave

    Open Circuit Sensitivity

    Phantom: -55 dB (1.7 mV) re 1V at 1 Pa Battery: -56 dB (1.5 mV) re 1V at 1 Pa

    Impedance

    Phantom: 200 Ω
    Battery: 270 Ω

    Maximum Input Sound Level

    Phantom: 146 dB, 1 kHz at Max SPL Battery: 132 dB, 1 kHz at Max SPL

    Dynamic Range (Typical)

    Phantom: 111 dB, 1 kHz at Max SPL Battery: 97 dB, 1 kHz at Max SPL

    Signal-To-Noise Ratio

    59 dB, 1 kHz at 1 Pa

    Phantom Power

    11-52V DC, 2 mA typical

    Battery Type

    1.5V AA/UM3

    Battery Current / Life

    0.4 mA / 1200 hours typical

    Switch

    Off, on-flat, on-roll-off

    Weight

    Microphone: 60 g;
    Power Module: 139 g

    Dimensions

    Headset: 120.0 mm - nominal at widest point, 80.5 mm - flexible boom, Microphone: 20.4 mm - diameter, Power Module: 84.0(H) x 63.0(W) x 22.9(D) mm

    Output Connector

    Integral 3-pin XLRM-type

    Cable

    1.4 m long (permanently attached to microphone), 2.8 mm diameter, 2-conductor shielded cable with TA3Ftype connector

    Accessories Furnished

    AT8531 power module; AT8439 clothing clip; AT8139L large windscreen; AT8139S small windscreen; battery

    Download

    audio technica support 119_1_ATM73a.pdf - Operation Manual